/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/product-lines/minepump_spec4_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:04:57,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:04:57,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:04:57,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:04:57,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:04:57,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:04:57,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:04:57,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:04:57,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:04:57,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:04:57,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:04:57,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:04:57,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:04:57,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:04:57,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:04:57,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:04:57,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:04:57,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:04:57,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:04:57,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:04:57,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:04:57,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:04:57,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:04:57,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:04:57,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:04:57,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:04:57,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:04:57,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:04:57,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:04:57,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:04:57,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:04:57,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:04:57,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:04:57,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:04:57,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:04:57,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:04:57,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:04:57,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:04:57,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:04:57,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:04:57,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:04:57,780 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:04:57,802 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:04:57,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:04:57,803 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:04:57,803 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:04:57,804 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:04:57,804 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:04:57,804 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:04:57,804 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:04:57,804 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:04:57,804 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:04:57,805 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:04:57,805 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:04:57,805 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:04:57,805 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:04:57,805 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:04:57,805 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:04:57,805 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:04:57,805 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:04:57,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:04:57,806 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:04:57,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:04:57,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:04:57,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:04:57,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:04:57,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:04:57,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:04:57,807 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:04:57,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:04:57,807 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:04:57,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:04:57,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:04:57,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:04:57,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:04:57,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:04:57,807 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:04:57,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:04:57,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:04:57,808 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:04:57,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:04:57,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:04:57,808 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:04:57,808 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:04:57,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:04:58,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:04:58,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:04:58,016 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:04:58,016 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:04:58,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/minepump_spec4_product21.cil.c [2023-04-01 12:04:58,997 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:04:59,204 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:04:59,205 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product21.cil.c [2023-04-01 12:04:59,225 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6acbe687a/ae943d1ba473421db9f6b911378cfa36/FLAG58412a075 [2023-04-01 12:04:59,577 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6acbe687a/ae943d1ba473421db9f6b911378cfa36 [2023-04-01 12:04:59,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:04:59,580 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:04:59,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:04:59,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:04:59,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:04:59,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:04:59" (1/1) ... [2023-04-01 12:04:59,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6b347c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:59, skipping insertion in model container [2023-04-01 12:04:59,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:04:59" (1/1) ... [2023-04-01 12:04:59,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:04:59,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:04:59,757 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product21.cil.c[5064,5077] [2023-04-01 12:04:59,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:04:59,824 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:04:59,839 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product21.cil.c[5064,5077] [2023-04-01 12:04:59,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:04:59,896 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:04:59,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:59 WrapperNode [2023-04-01 12:04:59,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:04:59,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:04:59,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:04:59,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:04:59,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:59" (1/1) ... [2023-04-01 12:04:59,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:59" (1/1) ... [2023-04-01 12:04:59,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:59" (1/1) ... [2023-04-01 12:04:59,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:59" (1/1) ... [2023-04-01 12:04:59,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:59" (1/1) ... [2023-04-01 12:04:59,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:59" (1/1) ... [2023-04-01 12:04:59,950 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:59" (1/1) ... [2023-04-01 12:04:59,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:59" (1/1) ... [2023-04-01 12:04:59,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:04:59,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:04:59,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:04:59,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:04:59,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:59" (1/1) ... [2023-04-01 12:04:59,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:04:59,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:04:59,980 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:04:59,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:05:00,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:05:00,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:05:00,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 12:05:00,003 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:05:00,003 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 12:05:00,003 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-04-01 12:05:00,003 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2023-04-01 12:05:00,003 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2023-04-01 12:05:00,003 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2023-04-01 12:05:00,003 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-04-01 12:05:00,003 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-04-01 12:05:00,003 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-04-01 12:05:00,003 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2023-04-01 12:05:00,004 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2023-04-01 12:05:00,004 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 12:05:00,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 12:05:00,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 12:05:00,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 12:05:00,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 12:05:00,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 12:05:00,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 12:05:00,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 12:05:00,004 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 12:05:00,004 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 12:05:00,004 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 12:05:00,004 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 12:05:00,005 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 12:05:00,005 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 12:05:00,005 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 12:05:00,005 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 12:05:00,005 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:05:00,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2023-04-01 12:05:00,005 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2023-04-01 12:05:00,005 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-04-01 12:05:00,005 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-04-01 12:05:00,005 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-04-01 12:05:00,005 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2023-04-01 12:05:00,005 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2023-04-01 12:05:00,005 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2023-04-01 12:05:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:05:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:05:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:05:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:05:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 12:05:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 12:05:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2023-04-01 12:05:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-04-01 12:05:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2023-04-01 12:05:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2023-04-01 12:05:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 12:05:00,006 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2023-04-01 12:05:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-04-01 12:05:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-04-01 12:05:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2023-04-01 12:05:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2023-04-01 12:05:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2023-04-01 12:05:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-04-01 12:05:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2023-04-01 12:05:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2023-04-01 12:05:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-04-01 12:05:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-04-01 12:05:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-04-01 12:05:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 12:05:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 12:05:00,007 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 12:05:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 12:05:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 12:05:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 12:05:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 12:05:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 12:05:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:05:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 12:05:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 12:05:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:05:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 12:05:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 12:05:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:05:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 12:05:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 12:05:00,008 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 12:05:00,009 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 12:05:00,009 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 12:05:00,009 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 12:05:00,009 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 12:05:00,009 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 12:05:00,009 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 12:05:00,009 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 12:05:00,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:05:00,009 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2023-04-01 12:05:00,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:05:00,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:05:00,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:05:00,110 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:05:00,112 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:05:00,524 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:05:00,635 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:05:00,636 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 12:05:00,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:05:00 BoogieIcfgContainer [2023-04-01 12:05:00,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:05:00,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:05:00,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:05:00,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:05:00,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:04:59" (1/3) ... [2023-04-01 12:05:00,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25453ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:05:00, skipping insertion in model container [2023-04-01 12:05:00,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:59" (2/3) ... [2023-04-01 12:05:00,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25453ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:05:00, skipping insertion in model container [2023-04-01 12:05:00,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:05:00" (3/3) ... [2023-04-01 12:05:00,644 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product21.cil.c [2023-04-01 12:05:00,656 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:05:00,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:05:00,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:05:00,704 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@c89d18e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:05:00,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:05:00,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 74 states have internal predecessors, (78), 45 states have call successors, (45), 27 states have call predecessors, (45), 27 states have return successors, (45), 41 states have call predecessors, (45), 45 states have call successors, (45) [2023-04-01 12:05:00,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 12:05:00,713 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:05:00,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:05:00,714 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:05:00,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:05:00,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1090383499, now seen corresponding path program 1 times [2023-04-01 12:05:00,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:05:00,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788664647] [2023-04-01 12:05:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:05:00,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:05:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:05:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:05:00,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:05:00,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788664647] [2023-04-01 12:05:00,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788664647] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:05:00,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:05:00,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 12:05:00,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797557908] [2023-04-01 12:05:00,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:05:00,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 12:05:00,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:05:00,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 12:05:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 12:05:00,935 INFO L87 Difference]: Start difference. First operand has 137 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 74 states have internal predecessors, (78), 45 states have call successors, (45), 27 states have call predecessors, (45), 27 states have return successors, (45), 41 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 12:05:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:05:00,985 INFO L93 Difference]: Finished difference Result 207 states and 250 transitions. [2023-04-01 12:05:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 12:05:00,987 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2023-04-01 12:05:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:05:00,993 INFO L225 Difference]: With dead ends: 207 [2023-04-01 12:05:00,993 INFO L226 Difference]: Without dead ends: 104 [2023-04-01 12:05:00,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 12:05:00,998 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:05:00,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:05:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-01 12:05:01,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-04-01 12:05:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 62 states have internal predecessors, (64), 30 states have call successors, (30), 25 states have call predecessors, (30), 20 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-01 12:05:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2023-04-01 12:05:01,036 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 42 [2023-04-01 12:05:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:05:01,037 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2023-04-01 12:05:01,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 12:05:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2023-04-01 12:05:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 12:05:01,039 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:05:01,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:05:01,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:05:01,039 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:05:01,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:05:01,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1472809281, now seen corresponding path program 1 times [2023-04-01 12:05:01,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:05:01,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050225756] [2023-04-01 12:05:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:05:01,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:05:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:05:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:05:01,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:05:01,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050225756] [2023-04-01 12:05:01,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050225756] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:05:01,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:05:01,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:05:01,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258937820] [2023-04-01 12:05:01,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:05:01,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:05:01,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:05:01,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:05:01,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:05:01,182 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 12:05:01,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:05:01,226 INFO L93 Difference]: Finished difference Result 165 states and 189 transitions. [2023-04-01 12:05:01,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:05:01,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-04-01 12:05:01,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:05:01,231 INFO L225 Difference]: With dead ends: 165 [2023-04-01 12:05:01,231 INFO L226 Difference]: Without dead ends: 96 [2023-04-01 12:05:01,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:05:01,238 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:05:01,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 178 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:05:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-01 12:05:01,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-04-01 12:05:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 57 states have internal predecessors, (58), 27 states have call successors, (27), 24 states have call predecessors, (27), 20 states have return successors, (23), 19 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-01 12:05:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2023-04-01 12:05:01,247 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 43 [2023-04-01 12:05:01,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:05:01,247 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2023-04-01 12:05:01,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 12:05:01,247 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2023-04-01 12:05:01,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 12:05:01,248 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:05:01,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:05:01,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:05:01,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:05:01,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:05:01,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1457355343, now seen corresponding path program 1 times [2023-04-01 12:05:01,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:05:01,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916383163] [2023-04-01 12:05:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:05:01,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:05:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:05:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:05:01,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:05:01,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916383163] [2023-04-01 12:05:01,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916383163] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:05:01,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:05:01,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:05:01,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010355767] [2023-04-01 12:05:01,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:05:01,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:05:01,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:05:01,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:05:01,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:05:01,368 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 12:05:01,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:05:01,407 INFO L93 Difference]: Finished difference Result 170 states and 195 transitions. [2023-04-01 12:05:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:05:01,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2023-04-01 12:05:01,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:05:01,409 INFO L225 Difference]: With dead ends: 170 [2023-04-01 12:05:01,409 INFO L226 Difference]: Without dead ends: 96 [2023-04-01 12:05:01,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:05:01,410 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 85 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:05:01,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 93 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:05:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-01 12:05:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-04-01 12:05:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 48 states have (on average 1.1875) internal successors, (57), 56 states have internal predecessors, (57), 27 states have call successors, (27), 24 states have call predecessors, (27), 20 states have return successors, (23), 19 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-01 12:05:01,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2023-04-01 12:05:01,419 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 45 [2023-04-01 12:05:01,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:05:01,419 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2023-04-01 12:05:01,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 12:05:01,420 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2023-04-01 12:05:01,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 12:05:01,421 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:05:01,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:05:01,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:05:01,421 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:05:01,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:05:01,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1531278314, now seen corresponding path program 1 times [2023-04-01 12:05:01,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:05:01,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519864801] [2023-04-01 12:05:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:05:01,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:05:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:05:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:05:01,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:05:01,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519864801] [2023-04-01 12:05:01,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519864801] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:05:01,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:05:01,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 12:05:01,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109791100] [2023-04-01 12:05:01,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:05:01,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 12:05:01,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:05:01,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 12:05:01,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:05:01,660 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 12:05:01,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:05:01,966 INFO L93 Difference]: Finished difference Result 301 states and 354 transitions. [2023-04-01 12:05:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:05:01,967 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 58 [2023-04-01 12:05:01,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:05:01,975 INFO L225 Difference]: With dead ends: 301 [2023-04-01 12:05:01,975 INFO L226 Difference]: Without dead ends: 227 [2023-04-01 12:05:01,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-04-01 12:05:01,985 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 183 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:05:01,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 582 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:05:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-04-01 12:05:02,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 219. [2023-04-01 12:05:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 115 states have (on average 1.2) internal successors, (138), 134 states have internal predecessors, (138), 58 states have call successors, (58), 49 states have call predecessors, (58), 45 states have return successors, (56), 42 states have call predecessors, (56), 54 states have call successors, (56) [2023-04-01 12:05:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 252 transitions. [2023-04-01 12:05:02,022 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 252 transitions. Word has length 58 [2023-04-01 12:05:02,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:05:02,022 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 252 transitions. [2023-04-01 12:05:02,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 12:05:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 252 transitions. [2023-04-01 12:05:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 12:05:02,030 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:05:02,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:05:02,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:05:02,030 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:05:02,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:05:02,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1783980391, now seen corresponding path program 1 times [2023-04-01 12:05:02,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:05:02,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671366484] [2023-04-01 12:05:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:05:02,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:05:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:05:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:05:02,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:05:02,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671366484] [2023-04-01 12:05:02,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671366484] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:05:02,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:05:02,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:05:02,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789294747] [2023-04-01 12:05:02,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:05:02,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:05:02,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:05:02,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:05:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:05:02,124 INFO L87 Difference]: Start difference. First operand 219 states and 252 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-04-01 12:05:02,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:05:02,148 INFO L93 Difference]: Finished difference Result 341 states and 401 transitions. [2023-04-01 12:05:02,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:05:02,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 61 [2023-04-01 12:05:02,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:05:02,150 INFO L225 Difference]: With dead ends: 341 [2023-04-01 12:05:02,150 INFO L226 Difference]: Without dead ends: 144 [2023-04-01 12:05:02,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:05:02,152 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 51 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:05:02,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 62 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:05:02,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-04-01 12:05:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-04-01 12:05:02,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 87 states have internal predecessors, (89), 33 states have call successors, (33), 33 states have call predecessors, (33), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-04-01 12:05:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 151 transitions. [2023-04-01 12:05:02,178 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 151 transitions. Word has length 61 [2023-04-01 12:05:02,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:05:02,178 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 151 transitions. [2023-04-01 12:05:02,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-04-01 12:05:02,179 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 151 transitions. [2023-04-01 12:05:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 12:05:02,179 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:05:02,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:05:02,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:05:02,180 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:05:02,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:05:02,180 INFO L85 PathProgramCache]: Analyzing trace with hash -709585617, now seen corresponding path program 1 times [2023-04-01 12:05:02,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:05:02,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321602150] [2023-04-01 12:05:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:05:02,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:05:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:05:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 12:05:02,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:05:02,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321602150] [2023-04-01 12:05:02,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321602150] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:05:02,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230370334] [2023-04-01 12:05:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:05:02,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:05:02,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:05:02,414 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:05:02,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:05:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:05:02,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 12:05:02,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:05:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 12:05:02,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:05:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 12:05:03,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230370334] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:05:03,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1089685845] [2023-04-01 12:05:03,445 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2023-04-01 12:05:03,445 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:05:03,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:05:03,455 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:05:03,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:05:03,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 12:05:03,877 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 125 for LOIs [2023-04-01 12:05:05,165 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 125 for LOIs [2023-04-01 12:05:05,198 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 119 for LOIs [2023-04-01 12:05:05,235 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 119 for LOIs [2023-04-01 12:05:05,250 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 125 for LOIs [2023-04-01 12:05:07,229 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 122 for LOIs [2023-04-01 12:05:07,248 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 138 for LOIs [2023-04-01 12:05:07,670 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 117 for LOIs [2023-04-01 12:05:08,024 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 119 for LOIs [2023-04-01 12:05:08,041 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 117 for LOIs [2023-04-01 12:05:08,054 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 119 for LOIs [2023-04-01 12:05:08,072 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 119 for LOIs [2023-04-01 12:05:08,085 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment with input of size 135 for LOIs [2023-04-01 12:05:08,324 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 135 for LOIs [2023-04-01 12:05:08,527 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 133 for LOIs [2023-04-01 12:05:08,545 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 12:05:16,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1089685845] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:05:16,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 12:05:16,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [7, 14, 12] total 57 [2023-04-01 12:05:16,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894618760] [2023-04-01 12:05:16,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:05:16,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-01 12:05:16,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:05:16,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-01 12:05:16,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2798, Unknown=0, NotChecked=0, Total=3192 [2023-04-01 12:05:16,647 INFO L87 Difference]: Start difference. First operand 144 states and 151 transitions. Second operand has 31 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 11 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2023-04-01 12:05:23,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:05:23,790 INFO L93 Difference]: Finished difference Result 316 states and 345 transitions. [2023-04-01 12:05:23,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 12:05:23,790 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 11 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 97 [2023-04-01 12:05:23,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:05:23,792 INFO L225 Difference]: With dead ends: 316 [2023-04-01 12:05:23,792 INFO L226 Difference]: Without dead ends: 269 [2023-04-01 12:05:23,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 239 SyntacticMatches, 17 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=856, Invalid=4844, Unknown=0, NotChecked=0, Total=5700 [2023-04-01 12:05:23,794 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 227 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:05:23,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 81 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 12:05:23,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-04-01 12:05:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 249. [2023-04-01 12:05:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 146 states have (on average 1.095890410958904) internal successors, (160), 154 states have internal predecessors, (160), 53 states have call successors, (53), 53 states have call predecessors, (53), 49 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-04-01 12:05:23,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 262 transitions. [2023-04-01 12:05:23,836 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 262 transitions. Word has length 97 [2023-04-01 12:05:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:05:23,836 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 262 transitions. [2023-04-01 12:05:23,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 11 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2023-04-01 12:05:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 262 transitions. [2023-04-01 12:05:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 12:05:23,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:05:23,838 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:05:23,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 12:05:24,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 12:05:24,045 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:05:24,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:05:24,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1117842198, now seen corresponding path program 1 times [2023-04-01 12:05:24,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:05:24,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810435662] [2023-04-01 12:05:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:05:24,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:05:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:05:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 12:05:24,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:05:24,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810435662] [2023-04-01 12:05:24,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810435662] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:05:24,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131451158] [2023-04-01 12:05:24,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:05:24,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:05:24,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:05:24,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:05:24,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 12:05:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:05:24,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 12:05:24,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:05:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 12:05:24,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:05:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 12:05:24,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131451158] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:05:24,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1237789854] [2023-04-01 12:05:24,993 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-04-01 12:05:24,993 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:05:24,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:05:24,993 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:05:24,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:05:25,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 12:05:25,142 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 125 for LOIs [2023-04-01 12:05:25,871 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 125 for LOIs [2023-04-01 12:05:25,898 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 119 for LOIs [2023-04-01 12:05:25,910 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 119 for LOIs [2023-04-01 12:05:25,923 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 125 for LOIs [2023-04-01 12:05:29,658 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 163 for LOIs [2023-04-01 12:05:29,721 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 175 for LOIs [2023-04-01 12:05:30,308 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 154 for LOIs [2023-04-01 12:05:30,777 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 156 for LOIs [2023-04-01 12:05:30,801 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 154 for LOIs [2023-04-01 12:05:30,819 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 166 for LOIs [2023-04-01 12:05:30,846 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 119 for LOIs [2023-04-01 12:05:30,862 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 119 for LOIs [2023-04-01 12:05:30,874 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment with input of size 172 for LOIs [2023-04-01 12:05:31,194 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 172 for LOIs [2023-04-01 12:05:31,467 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 170 for LOIs [2023-04-01 12:05:31,492 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 12:05:43,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1237789854] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:05:43,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 12:05:43,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [7, 14, 12] total 59 [2023-04-01 12:05:43,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042553854] [2023-04-01 12:05:43,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:05:43,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 12:05:43,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:05:43,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 12:05:43,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=3018, Unknown=0, NotChecked=0, Total=3422 [2023-04-01 12:05:43,994 INFO L87 Difference]: Start difference. First operand 249 states and 262 transitions. Second operand has 33 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 25 states have internal predecessors, (38), 12 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14)